There is likely a good reason that these particular amount fields cannot be accessed through the Finder or through the search function in the Ledger Reports Preview area. I am going to say simply that this is because they are not available in these areas. Good suggestion though - I will put it on the 'wish list'.

You still have yet another option! In the Financial Reporter, you can 'drill down' to the original transactions, if this will help. To see how this works, open FR and then one of your financial specifications. Then...
1. Right-click on the cell that contains the balance for the account in question.
2. Select Details... (a new window will pop up, displaying the associated entries for this account. If you use Departments, it will break it down into dept totals.
3. You can now click on any of the fields (cells) to get a drill down for the respective Fiscal Periods.
4. Click on any of these to see a complete breakdown for each period (you can even select the period from the scroll box at top)

Is this better - I am running out of options now!

Regards
Tech Support

The reason you can't search on the detail amounts is that there is no inquiry into this file (it has no "key").

The fastest way to get the information you're looking for is to use Quik Reports and link to the Posted Transaction File and Chart of Account (if you need the account description). Lay out the report the way you want, with whatever subtotals or page breaks make sense, then add the selection rule

ABS(TxAmount)>200.00

You need the absolute value function to get both debit and credit entries.